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https://www.readbyqxmd.com/read/27906524/the-development-of-autism-spectrum-disorders-variability-and-causal-complexity
#1
REVIEW
Robert H Wozniak, Nina B Leezenbaum, Jessie B Northrup, Kelsey L West, Jana M Iverson
The autism spectrum is highly variable, both behaviorally and neurodevelopmentally. Broadly speaking, four related factors contribute to this variability: (1) genetic processes, (2) environmental events, (3) gene × environment interactions, and (4) developmental factors. Given the complexity of the relevant processes, it appears unlikely that autism spectrum atypicalities can be attributed to any one causal mechanism. Rather, the development of neural atypicality reflects an interaction of genetic and environmental risk factors...
December 1, 2016: Wiley Interdisciplinary Reviews. Cognitive Science
https://www.readbyqxmd.com/read/27906523/developmental-evolution
#2
REVIEW
Robert Lickliter
Biologists and psychologists are re-thinking the long-standing premise of genes as the primary cause of development, a view widely embraced in 20th-century biology. This shift in thinking is based in large part on: (1) the growing appreciation of the complex, distributed regulatory dynamics of gene expression; and (2) the growing appreciation of the probabilistic, contingent, and situated nature of development. We now appreciate that what actually unfolds during individual development represents only one of many possibilities...
December 1, 2016: Wiley Interdisciplinary Reviews. Cognitive Science
https://www.readbyqxmd.com/read/27906509/principles-of-brain-development
#3
REVIEW
Joan Stiles
Throughout much of the 20th century, the major models of brain development were strongly deterministic. It was thought that brain development proceeds via a prescribed blueprint that is somehow innately specified in the organism. Contemporary models present a distinctly different view of both inheritance and brain development. First, we do not inherit blueprints or plans, we inherit genes and the cellular machinery for expressing them. Genes carry essential information for creating proteins, but do not determine biological processes or developmental outcomes; the first cells contain the elements necessary for creating proteins based on the information coded in the nucleotide sequences of genes...
December 1, 2016: Wiley Interdisciplinary Reviews. Cognitive Science
https://www.readbyqxmd.com/read/27906199/microduplication-of-the-arid1a-gene-causes-intellectual-disability-with-recognizable-syndromic-features
#4
Marie Bidart, Michèle El Atifi, Sarra Miladi, John Rendu, Véronique Satre, Pierre F Ray, Caroline Bosson, Françoise Devillard, Daphné Lehalle, Valérie Malan, Jeanne Amiel, Maria Antonietta Mencarelli, Margherita Baldassarri, Alessandra Renieri, Jill Clayton-Smith, Gaëlle Vieville, Julien Thevenon, Florence Amblard, François Berger, Pierre-Simon Jouk, Charles Coutton
PURPOSE: To determine whether duplication of the ARID1A gene is responsible for a new recognizable syndrome. METHODS: We describe four patients with a 1p36.11 microduplication involving ARID1A as identified by array-comparative genomic hybridization . We performed comparative transcriptomic analysis of patient-derived fibroblasts using RNA sequencing and evaluated the impact of ARID1A duplication on the cell cycle using fluorescence-activated cell sorting. Functional relationships between differentially expressed genes were investigated with ingenuity pathway analysis (IPA)...
December 1, 2016: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/27905558/microrna-mir-34-provides-robustness-to-environmental-stress-response-via-the-daf-16-network-in-c-elegans
#5
Meltem Isik, T Keith Blackwell, Eugene Berezikov
Diverse stresses and aging alter expression levels of microRNAs, suggesting a role for these posttranscriptional regulators of gene expression in stress modulation and longevity. Earlier studies demonstrated a central role for the miR-34 family in promoting cell cycle arrest and cell death following stress in human cells. However, the biological significance of this response was unclear. Here we show that in C. elegans mir-34 upregulation is necessary for developmental arrest, correct morphogenesis, and adaptation to a lower metabolic state to protect animals against stress-related damage...
December 1, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27905054/crosstalk-between-shh-and-stemness-state-signaling-pathways-in-esophageal-squamous-cell-carcinoma
#6
Maryam Najafi, Mohammad Reza Abbaszadegan, Abolfazl Rad, Mahtab Dastpak, Samaneh Boroumand-Noughabi, Mohammad Mahdi Forghanifard
The expression of GLI1 as a downstream gene of sonic hedgehog (Hh) pathway, studied in a variety of cancers including esophageal squamous cell carcinoma (ESCC). However, the interaction of Hh with other developmental pathways needs to be elucidated. In this study, we aimed to investigate the correlation of GLI1 expression with transcription factors (TFs) of stem cell signaling pathways, and their association with clinico-pathological data of ESCC. Using real-time PCR, we assessed the expression of GLI1 mRNA in 49 ESCC patients, and analyzed the correlation between GLI1 and selected TFs...
November 30, 2016: Journal of Cell Communication and Signaling
https://www.readbyqxmd.com/read/27904971/mutations-in-slc5a6-associated-with-brain-immune-bone-and-intestinal-dysfunction-in-a-young-child
#7
Veedamali S Subramanian, Alexandru R Constantinescu, Paul J Benke, Hamid M Said
The human sodium-dependent multivitamin transporter (hSMVT) is a product of the SLC5A6 gene and mediates biotin, pantothenic acid, and lipoate uptake in a variety of cellular systems. We report here the identification of mutations R94X, a premature termination, and R123L, a dysfunctional amino acid change, both in exon 3 of the SLC5A6 gene in a child using whole genome-scanning. At 15 months of age, the child showed failure to thrive, microcephaly and brain changes on MRI, cerebral palsy and developmental delay, variable immunodeficiency, and severe gastro-esophageal reflux requiring a gastrostomy tube/fundoplication, osteoporosis, and pathologic bone fractures...
November 30, 2016: Human Genetics
https://www.readbyqxmd.com/read/27904685/phylogenetic-analysis-of-basic-helix-loop-helix-transcription-factors-in-the-genome-of-a-typical-human-disease-vector
#8
Meng-Yun Chen, Ying Dong, Rui-Xue Chang, Qian-Qian Ang, Ran Zhang, Yan-Yan Wu, Yi-Hui Xu, Wen-Sheng Lu, Xiao-Dong Zheng
Ixodes scapularis, the black-legged tick, is one of the most common human-disease vectors and transmits Borrelia species, such as B. burgdorferi, as well as Theileria microti, Anaplasma phagocytophilum, etc. As basic helix-loop-helix (bHLH) transcription factors have been recognized for many years as important regulators of various developmental processes, we performed phylogenetic analysis of the black-legged tick genome in order to identify the number and family of bHLH transcription factors. Because bHLH family members have been identified in many organisms, including silkworm and fruit fly, we were able to conduct this survey and identify 58 putative bHLH transcription factors...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27903903/novel-roles-of-hp1a-and-mcm10-in-dna-replication-genome-maintenance-and-photoreceptor-cell-differentiation
#9
Nicole Vo, Dang Ngoc Anh Suong, Natsuki Yoshino, Hideki Yoshida, Sue Cotterill, Masamitsu Yamaguchi
Both Mcm10 and HP1a are known to be required for DNA replication. However, underlying mechanism is not clarified yet especially for HP1. Knockdown of both HP1a and Mcm10 genes inhibited the progression of S phase in Drosophila eye imaginal discs. Proximity Ligation Assay (PLA) demonstrated that HP1a is in close proximity to DNA replication proteins including Mcm10, RFC140 and DNA polymerase ϵ 255 kDa subunit in S-phase. This was further confirmed by co-immunoprecipitation assay. The PLA signals between Mcm10 and HP1a are specifically observed in the mitotic cycling cells, but not in the endocycling cells...
November 29, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27903293/personalized-medicine-approach-confirms-a-milder-case-of-abat-deficiency
#10
A Besse, A K Petersen, J V Hunter, V Appadurai, S R Lalani, P E Bonnen
ABAT deficiency (OMIM 613163) is a rare inborn error of metabolism caused by recessive variants in the gene 4-aminobutyric acid transaminase (ABAT), which is responsible for both the catalysis of GABA and maintenance of nucleoside pools in the mitochondria. To date, only a few patients have been reported worldwide. Their clinical presentation has been remarkably consistent with primary features of severe psychomotor retardation, encephalopathy, hypotonia, and infantile-onset refractory epilepsy. We report a new case of ABAT deficiency that marks an important departure from previous clinical findings...
December 1, 2016: Molecular Brain
https://www.readbyqxmd.com/read/27903232/solution-structure-and-expression-profile-of-an-insect-cytokine-manduca-sexta-stress-response-peptide-2
#11
Lynn Goss Schrag, Xiaolong Cao, Alvaro Ivan Herrera, Yang Wang, Haobo Jiang, Om Prakash
Manduca sexta stress response peptide-2 (SRP2) is predicted to be a 25-residue peptide (FGVKDGKCPSGRVRRLGICVPDDDY), which may function as an insect cytokine to regulate immune responses. Produced as an inactive precursor, endogenous proSRP2 is probably converted to active SRP2 by limited proteolysis in response to invading pathogens, along with prophenoloxidase and pro-Spätzle activation. In addition to immunity, SRP2 may control head morphogenesis or other developmental processes in the lepidopteran insect...
November 21, 2016: Protein and Peptide Letters
https://www.readbyqxmd.com/read/27902788/fertilization-of-grapevine-based-on-gene-expression
#12
Cheng Zhang, Haifeng Jia, Jingjue Zeng, Tariq Perraiz, Zhenqiang Xie, Xudong Zhu, Chen Wang
The application of genetic information in agricultural production is an important issue, which is highly worthy of attention. Gene expression data can accurately reflect the growth and metabolic status of plants, with which we can predict and monitor the nutritional requirements of plants and then derive accurate fertilization strategies. In this study, to verify the feasibility and workability of gene information-based fertilization strategies and to figure out the specific nutritional requirements of grapevine ( L...
November 2016: Plant Genome
https://www.readbyqxmd.com/read/27902763/temperature-shift-alters-dna-methylation-and-histone-modification-patterns-in-gonadal-aromatase-cyp19a1-gene-in-species-with-temperature-dependent-sex-determination
#13
Yuiko Matsumoto, Brette Hannigan, David Crews
The environment surrounding the embryos has a profound impact on the developmental process and phenotypic outcomes of the organism. In species with temperature-dependent sex determination, gonadal sex is determined by the incubation temperature of the eggs. A mechanistic link between temperature and transcriptional regulation of developmental genes, however, remains elusive. In this study, we examine the changes in DNA methylation and histone modification patterns of the aromatase (cyp19a1) gene in embryonic gonads of red-eared slider turtles (Trachemys scripta) subjected to a temperature shift during development...
2016: PloS One
https://www.readbyqxmd.com/read/27902697/a-novel-zebrafish-ret-heterozygous-model-of-hirschsprung-disease-identifies-a-functional-role-for-mapk10-as-a-modifier-of-enteric-nervous-system-phenotype-severity
#14
Tiffany A Heanue, Werend Boesmans, Donald M Bell, Koichi Kawakami, Pieter Vanden Berghe, Vassilis Pachnis
Hirschsprung disease (HSCR) is characterized by absence of enteric neurons from the distal colon and severe intestinal dysmotility. To understand the pathophysiology and genetics of HSCR we developed a unique zebrafish model that allows combined genetic, developmental and in vivo physiological studies. We show that ret mutant zebrafish exhibit cellular, physiological and genetic features of HSCR, including absence of intestinal neurons, reduced peristalsis, and varying phenotype expressivity in the heterozygous state...
November 2016: PLoS Genetics
https://www.readbyqxmd.com/read/27901477/the-neurotrophin-neuritin1-cpg15-is-involved-in-melanoma-migration-attachment-independent-growth-and-vascular-mimicry
#15
Anja Katrin Bosserhoff, Nadja Schneider, Lisa Ellmann, Lucie Heinzerling, Silke Kuphal
The neurotrophin Neuritin1 (NRN1; cpg15) belongs to the candidate plasticity gene (CPG) family and is expressed in postmitotic-differentiating neurons of the developmental nervous system and neuronal structures associated with plasticity in the brain of human adult.Our newest findings document that NRN1 deregulation could contribute also to disease development and have impact on malignant melanoma. Our analyses displayed the over-expression of NRN1 in melanoma in vitro and in vivo, shown by immunohistochemistry and qRT-PCR on microdissected melanoma tissue; furthermore, soluble NRN1 was detectable in tissue culture supernatant and serum of melanoma patients...
November 25, 2016: Oncotarget
https://www.readbyqxmd.com/read/27900808/genetic-and-developmental-basis-for-fin-shape-variation-in-african-cichlid-fishes
#16
Dina Navon, Nathan Olearczyk, R Craig Albertson
Adaptive radiations are often characterized by the rapid evolution of traits associated with divergent feeding modes. For example, the evolutionary history of African cichlids is marked by repeated and coordinated shifts in skull, trophic, fin and body shape. Here, we seek to explore the molecular basis for fin shape variation in Lake Malawi cichlids. We first described variation within an F2 mapping population derived by crossing two cichlid species with divergent morphologies including fin shape. We then used this population to genetically map loci that influence variation in this trait...
November 4, 2016: Molecular Ecology
https://www.readbyqxmd.com/read/27900779/mosaic-nras-q61r-mutation-in-a-child-with-giant-congenital-melanocytic-naevus-epidermal-naevus-syndrome-and-hypophosphataemic-rickets
#17
R Ramesh, N Shaw, E K Miles, B Richard, I Colmenero, C Moss
The association of hypophosphataemic rickets with verrucous epidermal naevus (EN) and elevated fibroblast growth factor 23 levels is known as cutaneous-skeletal hypophosphataemia syndrome (CSHS), and can be caused by somatic activating mutations in RAS genes. We report a unique patient with CSHS associated with giant congenital melanocytic naevus (CMN), neurocutaneous melanosis and EN syndrome, manifesting as facial linear sebaceous naevus, developmental delay and ocular dermoids. An activating mutation Q61R in the NRAS gene was found in affected skin and ocular tissue but not blood, implying that the disparate manifestations are due to a multilineage activating mutation (mosaic RASopathy)...
November 30, 2016: Clinical and Experimental Dermatology
https://www.readbyqxmd.com/read/27900360/scn8a-mutation-in-a-child-presenting-with-seizures-and-developmental-delays
#18
Janet Malcolmson, Robert Kleyner, David Tegay, Whit Adams, Kenneth Ward, Justine Coppinger, Lesa Nelson, Miriam H Meisler, Kai Wang, Reid Robison, Gholson J Lyon
The SCN8A gene encodes the sodium voltage-gated channel alpha subunit 8. Mutations in this gene have been associated with early infantile epileptic encephalopathy type 13. With the use of whole-exome sequencing, a de novo missense mutation in SCN8A was identified in a 4-yr-old female who initially exhibited symptoms of epilepsy at the age of 5 mo that progressed to a severe condition with very little movement, including being unable to sit or walk on her own.
November 2016: Cold Spring Harbor Molecular Case Studies
https://www.readbyqxmd.com/read/27899927/regulation-of-on-tree-vitamin-e-biosynthesis-in-olive-fruit-during-successive-growing-years-the-impact-of-fruit-development-and-environmental-cues
#19
Egli C Georgiadou, Vlasios Goulas, Thessaloniki Ntourou, George A Manganaris, Panagiotis Kalaitzis, Vasileios Fotopoulos
The term vitamin E refers to a group of eight lipophilic compounds known as tocochromanols. The tocochromanols are divided into two groups, that is, tocopherols and tocotrienols, with four forms each, namely α-, β-, γ-, and δ-. In order to explore the temporal biosynthesis of tocochromanols in olive (Olea europaea cv. 'Koroneiki') fruit during on-tree development and ripening over successive growing years, a combined array of analytical, molecular, bioinformatic, immunoblotting, and antioxidant techniques were employed...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27899677/the-mouse-gene-expression-database-gxd-2017-update
#20
Jacqueline H Finger, Constance M Smith, Terry F Hayamizu, Ingeborg J McCright, Jingxia Xu, Meiyee Law, David R Shaw, Richard M Baldarelli, Jon S Beal, Olin Blodgett, Jeff W Campbell, Lori E Corbani, Jill R Lewis, Kim L Forthofer, Pete J Frost, Sharon C Giannatto, Lucie N Hutchins, Dave B Miers, Howie Motenko, Kevin R Stone, Janan T Eppig, James A Kadin, Joel E Richardson, Martin Ringwald
The Gene Expression Database (GXD; www.informatics.jax.org/expression.shtml) is an extensive and well-curated community resource of mouse developmental expression information. Through curation of the scientific literature and by collaborations with large-scale expression projects, GXD collects and integrates data from RNA in situ hybridization, immunohistochemistry, RT-PCR, northern blot and western blot experiments. Expression data from both wild-type and mutant mice are included. The expression data are combined with genetic and phenotypic data in Mouse Genome Informatics (MGI) and made readily accessible to many types of database searches...
November 28, 2016: Nucleic Acids Research
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